The experimental class is a very important part of medical research graduate students in teaching practice. The lack of attention to experimental teaching, the unclear teaching purpose, and the disconnection between teaching content and practical application are the most important problems in current teaching practice. In this study, we propose to emphasize the experimental teaching objectives and experimental records to enhance students' initiative and standardize rigor; increase the training of advanced experimental equipment to improve students' hands-on ability; enrich teaching methods and means to improve teaching conditions; cultivate students' scientific thinking to enhance Student's experimental operating skills. The measures help comprehensively cultivate postgraduates' innovation and practical ability, and have great significance for medical research work.

The teaching content of biomaterials science is of boundness and vapidity, in additional, there is alack of interaction between teachers and students. The teaching efficiency of the biomaterials science is greatly reduced. In this paper, combining with the current research hotspots in biomaterials science, we put forward the reform of the teaching knowledge, teaching methods and teaching evaluation. By introducing the scientific research achievements and academic innovations of teachers, integrating Seminar teaching with flipped mode, combining with the characteristics of colleges and universities, from in-class to out-of-class, setting up the course for different specialties, establishing teaching evaluation with new network information, this paper discusses the teaching reform of biomaterials course, and puts forward new requirements and challenges.

Ardisia Crenata Radix is a traditional Chinese medicinal plant that belongs to the Myrsinaceae family,and its main active components are coumarins,saponins,flavonoids,and volatile oil.Bergenin,ardisicrenoside A,ardisicrenoside B,ardisiacripin A,ardisiacripin B,and embelin were identified as active anticancer compounds in in-depth studies into the anti-tumor effects of Ardisia Crenata Radix.They show high therapeutic potential in oral cancer,nasopharyngeal carcinoma,liver cancer,colon cancer,bladder cancer,cervical cancer,and leukemia,mainly by inducing tumor cell apoptosis,increasing tumor cytotoxicity,inhibiting cell proliferation,inhibiting tumor cell metastasis and migration,and inducing cell regulatory enzyme cascade reactions.However,most preclinical experimental data on cinnabar root's anti-tumor mechanism have not been verified in high-quality,multi-sample,and repeated randomized controlled trials,and there are a lack of clinical research data on tumor prognosis,pharmacodynamics,and pharmacokinetics.Accurate research experiments and clinical trials should be designed to further explore the pharmacological effects of Ardisia Crenata Radix.

Objective To study the hypoglycemic effect of Polygonatum sibiricum polysaccharides on type 2 diabetic mice and its effects on intestinal flora and pathological structure of small intestine. Methods Fifty male mice were used, except 10 were fed normally, the others were fed with high-fat and high-sugar diet for 6 weeks, and then injected with streptozotocin intraperitoneally to make type 2 diabetes mice model. After successful modeling, they were randomly divided into model group and Polygonatum sibiricum polysaccharides (500, 250, 125 mg/kg) group and the model group mice were given normal saline. The changes of bodyweight and blood glucose of mice in each group were recorded. After 4 weeks, feces were collected and sequenced by a 16S rRNA high-throughput sequencing, and the pathological changes of small intestine were observed by HE staining. Results In diabetic mice, the weight decreased. After given Polygonatum sibiricum polysaccharides, the weight of mice increased by 14.24%,11.97% and 8.78%, and the blood glucose decreased by 26.6%, 22.3% and 13.3%, respectively after high, medium and low doses of Polygonatum sibiricum polysaccharides were administered. In addition, the pathological disorder and swelling of intestinal histopathology were improved. There were significant differences in intestinal microorganisms between the model group and the Polygonatum sibiricum polysaccharides. Verrucomicrobiae in the model group increased significantly, while the microorganism abundance of Firmicutes and Bacteroidetes in the healthy group and Polygonatum sibiricum polysaccharides group was higher. Conclusion Polygonatum sibiricum polysaccharides has a significant hypoglycemic effect on diabetic mice and a certain protective effect on their intestines, the mechanism may be achieved by increasing the richness of beneficial bacteria and improving the immune function of mice, it’s in a certain dose-effect relationship, and its immune function needs further study.